Improvement in bessemer converters



UNITED STATES. PATENT OFFICE.

ALMON S. DUNNING, OF JOL'IET, ILLINOIS.

IMPROVEMENT IN BESSEMER CONVERTERS.

Specification forming part of Letters Patent No. 164,982, dated June 29,1875; application filed May 8, 1875.

To all whom it may concern:

Be it known that I, ALMON S. DUNNING, of Joliet, Will county, Illinois,have invented a new and Improved Converter, of which the following is aspecification:

The accompanying drawing represents a side elevation ot'my improvedconverter, partly in section.

My invention relates to an improved converter, used in the Bessemerprocess, so that the wear of the same is diminished, the interiorinspectedand repaired with greater facility, and the loss of metal byboiling over decreased.

The invention consists of a converter, the nose of which is constructedat the front part in straight or flattened shape.

In the drawing, A represents a converter as used in the Bessemer processfor making cast-steel, which isshown iu'section at the nosepart B forillustrating my improvement. The converters at present inuse are ofspherical shape, with an inclined cone or nose intersecting therewith atthe top. The nose forms an inwardly-projecting angle, curve, or corner,that is exposed to the strong current of flame issuing by the blast ofthe heated metal. The lining is thereby Worn ott' very fast, so thatconstant repairs are needed. The corner also prevents the inspecting andrepairing of the interior, and causes the more violent forcing up of theboiling metal, so as to produce slopping or boiling over. All thesedefects are substantially and satisfactorily remedied by changing thefront side b of the nose B from the curved angular shape, indicated inthe drawing in dotted lines, to a straight or nearly straight line.

By the removal of the projecting angle or curved convexity the sectionalarea of outlet is greatly increased, and consequently the force andvelocity of the blast diminished. Thus, any metal rolling up will fallback. I have made about twenty thousaud tons of steel under thisimprovement, and with not one-fourth the usual overflow. On the otherhand, the perpendicular inside face allows all the lining to beinspected and readily repaired through the nose B; hence,

What I claim as new and of my invention 1s A converter provided with theperpendicular inside face I), as and for the purpose specitied.

ALMON S. DUNN INGL Witnesses:

R. DOOLITTLE, PREsToN M. BONNER.

